Process of piecing warp-threads.



M. WENZEL.

PROCESS OF PIECING WARP'THREADS.

APPLICATION HLED AUG.10, l9l2- v 12%?3'71 6 Patented May29,1917.

3 SHEETS-SHEET l.

IVI. WENZEL.

PROCESS OF PIECING WARP THREADS.

APPLICATION FILED AUG- lb, I9I2. 1L,%%7,71 6

Patented May 29, 1917.

3 SHEETS-SHEET 2.

Wm ESSES; I

M. WENZEL.

PROCESS OF PIECING WARP THREADS.

APPLICATION FILED AUG. 10. 1912.

1,227,? 1 6 Patented May 29,1917.

3 SHEETSSHEET 3.

JR mum-Is PETERS Ca, PHOTO-Ll'nk) WASHVNIJHW I,

MAX WENZEL, OF SPREMBEEG, GERMANY.

PROCESS OF PIECING WARP-THREADS.

Specification of Letters Patent.

Patented liftay 29, 1917.

Application filed August 10, 1912. Serial No. 714,446.

To all whom it may concern:

Be it known that 1, MAX WnNznL, a subject of the German Emperor, residing at No. 18 Miihlenstrasse, Spremberg, Germany, have invented certain new and useful Tmprovements in the Processes of Piecing Warp-Threads, of which the following is a specification.

There are some warps which cannot stand being twisted firmly, and in the case of such warps it is not feasible to employ for piecing the warp threads the processes hitherto used which are based on twisting the ends of the threads together.

It has been found in practice that in the case of material which will not stand twisting, a simple spinning or whipping of the two ends of the. thread placed side by side, is suficient to piece them together. This whipping may be done with a warp thread or with a special thread.

Whipping with a warp thread is possible only when the warp is adapted for whipping. In Such a case at least one of the warp threads must consist of a thinner and stronger material. In all other cases a thin strong special whipping thread must be employed.

The whipping operation is performed by a special whipping appliance in a whipping apparatus which is provided with a store of thread or a determined length of thread when a special whipping thread is used. When a warp thread is used for whipping the whipping apparatus is provided with means for gripping the end of the thread which is to be whipped around the ends of the Warp threads.

One way of carrying out the improved process with the use of a special whipping thread is illustrated by way of example in the accompanying drawings in which Figures 1 to 6 show diagrammatically the several stages of the process.

Fig. 7 is a front elevation and Fig. 8 a plan of the whipping apparatus.

Fig. 9 is an end elevation of the whipping appliance.

Fig. 9 shows a section taken on the line 9 9 of Fig. 9.

Fig. 10 is a central vertical section of the whipping appliance.

Figs. 11 and 12 are diagrammatic views of the whipping thread holder and whipping thread conveyer respectively.

The ends of two warp threads a and Z) which are to be pieced together are placed overlapping each other as shown in Fig. 1, and are then introduced by means of bringing up hooks (Z cl (Fig. 2) in the usual manner in crossed form into the divided whipping appliance, the whipping ring 6 0 (Figs. 1 and 2). After the insertion in the whipping ring two clamps 2, 2 and 3, 3 located at either side of the ring are closed (Fig. 3) whereby those portions of the two warp threads that are to be traversed by the whipping ring are held parallel and close to each other.

The whipping ring 6 6 (Figs. 9 and 10) carries in its one part 6 a whipping spool 4. from which the whipping thread 0 is led by means of a thread guide 5 to the center of the whipping ring; its other part 6 is counterweighted to counter-balance the spool and the thread guide.

In addition to its rotary motion the whipping ring receives a to-and-fro motion between the clamps 2,2 and 3, 3. Its position of rest is at the clamps 3, 3. At that point the end 0 of the whipping thread is gripped and held by tongs or other holding device 7. The whipping ring while rotating, travels to the clamp 2, 2. By this means the first whipping is applied to the threads at and Z) between the clamps 2, 2 and 3, 3.

When this has been done, the tongs or holding device 7 can let go the end of the whipping thread 0.

The whipping ring now travels back to the clamp 3, 8, whereby the second but reversed whipping is effected. At the end of this travel the whipping ring stops, and a gripper 8 pulls the end of the whipping thread from between the whipping and the spool 4 out to one side so as to enable the tongs or holding device 7 to grip anew the end of the whipping thread (Fig. 5). The whipping thread 0 is then cut and the loose ends of the threads a and Z) are cut off in the usual manner (Fig. 6) and on opening the clamps 2, 2 and 3 3, the finished piecing can be removed from the whipping ring to make room for the next ends to be pieced together.

The parts 6 and e of the whipping appliance are rotatably mounted in the sliding bearings 7L and 2' (Fig. 7), said parts being provided with annular grooves e engaging annular projections h in the bearings, and are prevented by pawls 70, 70 from rotating while in their open position. When the a cord drive 12 from the main shaft 13 that is itself driven through a worm 127, wormwheel 128 and bevel wheels 129, 130, from the motor shaft 131.

The shaft 9 carries on its other end a worm 14 which engages a worm wheel 15 on the shaft 16 of the cam disk (7 that produces the upward movement of the sliding bearings 7L and i.

For the purpose of imparting to-and-fro motion to the whipping ring along the threads to be pieced together the frame T supporting the whipping ring is made capable of rotating on a vertical axis by means of vertical pivots 17, 17 in fixed bearings 18, 18. The rotation is effected for instance by means of a straight rack 19 and a curved rack 20 which is fixed on the lower pivot 17 of the supporting frame T. 'The rack 19 is guided in a straight line by suitable means and carries a roller or stud 21 engaging in a cam groove 22 of a cam disk 23. The cam disk 23 is mounted on a shaft 24: that is driven through spur wheels 25, 26 from the main shaft 13. The rotation of the cam disk 23 produces longitudinal motion of the rack 19 in both directions which motion is converted by the rack 20 into rotary motion of the supporting frame T in both directions.

The gripper S which has the function of pulling the whipping thread from between the finished whipping and the thread guide 5 sidewise out of the whipping appliance for the purpose of conveying it to the tongs or holder 7, is jointed as shown in Fig. 12, to the upwardly directed arm 27 of a bell crank lever 27, 29 rocking on a fixed pin 28. Over the other arm 29 of this lever there engages the end of the arm 30 of a lever 30, 31 which rocks on a fixed pin 32, the other arm 31 being under the influence of a cam 33 fixed to the cam 23. The arm 31 is pressed constantly against the cam 33 by the action of a spring 34-. upon the arm 30 (Fig. 7

The motion of the bell crank lever 27, 29 causes the gripper 8 to make a to-and-fro movement during which it is guided in a fixed cam groove 35. This cam groove imparts to the gripper 8 a rocking motion in a horizontal plane whereby the hook of the gripper is caused to pass behind the whipping thread 0 and grip and carry it along in its return movement.

The gripper 8 conveys the whipping thread 0 to the tongs or holder 7. These tongs are kept constantly closed by a spring 36 as shown in Fig. 11 and receive by means of a lever 37 fixed'on a rocking shaft 38 a rocking motion transversely to the longita dinal movement of the gripper 8. The shaft 38 receives the rocking motion through a connecting rod 39 which engages at one end an arm 40 on the rocking shaft 38 and is pressed at its other end by a spring 42 against the periphery of the cam disk 23 provided with a tappet 41 (Fig. 8). The spring 42 is attached at one end to a fixed guide 13 for the connecting rod 39 and at its other end to a lateral stud 44; of the connecting rod 39. During this rocking movement the tongs are opened for receiving and releasing the whipping thread.

The movable limb 45 (Fig. 11) of the tongs 7 carries a projection or tappet 46 which in the rocking movement of the tongs passes under a fixed stop 17 by which it is forced a my so that the tongs are opened in opposition to the action of the spring 36. The tongs are opened by the same meant during the return portion of the rocking movement for the purpose of releasing the severed end of the whipping thread.

The operation of the apparatus'is in accordance with the process to be carried out by it. On the completion of a piecingoperationthe whipping ring is opened, the completed piecing is removed, and a fresh pair of warp threads to be pieced together are placed in the whipping ring.

As the whipping ring stopped, and before it was opened, the gripper 8- had caught the whipping thread 0 between the completed whipping and the thread guide and moved it sidewise out of the whipping ring whereupon it was immediately caught and held in the hereinbefore described manner by the tongs 7 that are moved toward it. The tongs 7 hold the thread at least 'until a sufficient portion of the whipping has been effected in the next piecing ope-ration.

When the fresh pair of threads has been inserted, the whipping ring is closed in the usual manner, the pawls which hold it being disengaged so that it begins to rotate while the supporting frame T is rocked as aereinbefore described on its axis 17 17..

After the whipping is finished, the whipping ring a, e is opened. That is accomplished by the cam disk 9 upon passing into the position shown in Fig. 7, whereupon the sliding bearing 72. of the annular member 0 is drawn sid wise by the spring it which acts on the lever (Figs. 9 to 10). In this the downward movement is limited by the periphery of the cam disk 9', upon'which rests the lever g with its end connected'with the connecting rod 72/ of the sliding bearing 72.. In this downward movement of the sliding bearing 72. the arm m of the ratchet lever can snap into the notch provided in the periphery of the part 6, in order to hold the annular part c in the proper position (Fig. 7). The downward movement of the sliding bearing h for the annular part c is shortly followed by the upper sliding bearing 2', in which the upper annular part c is rotatably mounted. The downward move ment of the sliding bearing 2' is effected by pressure spring actin upon it from above which rests against a rigid stop 2'. The limitation of the downward movement is effected by a projection i on the upper edge of the sliding bearing and which extends over the guides of the sliding bearing. In the downward movement of the sliding bearing 2' the arm n of the pawl 72 leaves the stop 0, so that it is released from the action of its spring, which effects the engagement of pawl 70 in the notch provided for it in the periphery of part 0. Accordingly both parts 6 and e of the whipping ring come to rest, upon its opening, in the correct positions (Fig. 7). Now the gripper 8 (held in its position of rest by the spring 27) moves against the action of spring 27 by aid of the angle levers 27, 29, lever 30, 31 and connecting rod 33 on the shaft 24, in which movement it simultaneously receives a cross oscillation through the curved slit 35 in which it is guided by a pin. In doing so it grasps the thread lying within its reach and draws it into the tongs 7, the jaws of which are hereupon opened, because they are in the receiving position (Fig. 11 dotted) in which projection 46 on the limb 45 of the tongs has passed under the fixed stop 47. The opening of the tongs is efiected against the action of the spring 36 and the movement of the tongs from the position of rest (Fig. 11 traced) into the receiving position is effected by a connecting rod 39, which close to one end is guided in a stationary guide 43 and with a roller rests upon the periphery of a cam disk on shaft 24. The pressing of the connecting rod 39 upon the cam disk 41 is efiected by spring 42 which on one side is fastened to guide 43 and on the other side engages pin 44 on the connecting rod 39. With the opposite end connecting rod 39 grasps arm 40 on a shaft 38, on which is fastened also the arm 37 bearing the tongs. The tongs 7 returns immediately after the thread has been introduced into it, while the projection 46 on the limb 45 of the tongs leaves the stop 47, so that the spring 36 can close the tongs, which now hold fast the grasped thread, so that the thread ends for the new operation are held ready.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. A process for piecing together the threads of warps, said process consisting in disposing the warp threads in an approximately parallel intersecting relation; drawing together the intersecting threads at points remote from said intersection and bringing them into parallelism; supporting said threads in contact in said parallelism at said remote points and whipping a third thread back and forth a plurality of times continuously between said remote points; and cutting off the whipping thread and the surplus'ends of said warp threads.

2. A process for piecing together the threads of warps, said process consisting in supporting at two widely separated points a pair of limp warp threads in parallel contact; and whipping a third thread around said threads continuously between said points.

3. The hereindescribed process of piecing together the ends of warp threads, said process consisting in holding together the warp threads side by side and overlapping each other; and whipping a third thread, as is customary when piecing together ropes, consisting of the end piece of one of the warp threads, around the overlapping portion.

4. The hereindescribed process of piecing together the ends of warp threads, said process consisting in overlapping the threads and holding them, at two remote points, side by side, and whipping a thread around the overlapping portion between said points.

5. A process for piecing together threads of warps said process consisting in holding the end portions of the thread to be pieced side-by-side; and then while the pieces are held in this position, winding a thread around said portions, as is customary when piecing together ropes.

6. A process for piecing together threads of warps, said process consisting in applying the method which has become known for piecing together rope ends.

7. A process for piecing together the threads of warps, said process consisting in supporting at two widely separated points a pair of limp warp threads in parallel contact; and whipping a third thread around said threads back and forth several times continuously between said points while said threads are in said parallel contact.

8. A process for piecing together threads of warps, said process consisting in holding the end portions of the threads to be pieced side-by-side; and then while the pieces are held in this position, winding a third thread consisting of an end portion of one of said threads around said portions, as is customary when piecing together ropes.

9. A process for piecing together the threads of warps, said process consisting in disposing the warp threads'in an approximately parallel intersecting relation; drawing together the intersecting threads at points remote from said intersection and bringing them into parallelism; supporting said threads in contact in said parallelism at said remote points, and securing said threads together While in said position.

10. A process for piecing together the threads of Warps, said process consisting in disposing the Warp threads in an approximately parallel intersecting relation Without strain being imposed thereon, Winding a thread around the parallel portions in one direction and reWinding the thread over the Wound portion in an opposite direction to the starting point of the first 15 Winding.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

- MAX VVENZEL.

Witnesses WOLDEMAR HAUPT, HENRY HAsPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

